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Configuring DHCP Service DHCP Relay Configuration
User Guide 571
Switch(config-if)#end
Switch#copy running-config startup-config
3.2.3 Configuring DHCP Interface Relay
You can specify a DHCP server for a Layer 3 interface or for a VLAN. The following
introduces how to configure DHCP Interface Relay and DHCP VLAN Relay, respectively.
Follow these steps to DHCP Interface Relay:
Step 1 configure
Enter Global Configuration Mode.
Step 2 Enter Layer 3 Interface Configuration Mode:
Enter VLAN Interface Configuration Mode:
interface vlan
vlan-id
vlan-id
: Specify an IEEE 802.1Q VLAN ID that already exists, ranging from 1 to 4094.
Enter Routed Port Configuration Mode:
interface {
fastEthernet
port
| gigabitEthernet
port
| ten-gigabitEthernet
port
}
Enter Interface Configuration Mode.
port
: Specify the Ethernet port number, for example, 1/0/1.
no switchport
Switch the Layer 2 port into the Layer 3 routed port.
Enter Port-channel Interface Configuration Mode:
interface { port-cahnnel
port-channel
}
Enter Interface Configuration Mode.
port-channel
: Specify the port channel. Valid values are from 1 to 14.
no switchport
Switch the port channel to a Layer 3 port channel interface.
Step 3 ip helper-address
ip-addr
Specify DHCP server for the Layer 3 interface.
ip-addr:
Enter the IP address of the DHCP server.
Step 4 show ip dhcp relay
Verify the configuration of DHCP Relay.
Step 5 end
Return to Privileged EXEC Mode.
Step 6 copy running-config startup-config
Save the settings in the configuration file.
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